Sludge Pro Double Disc Pumps: Compare


Penn Valley Pump is NOT a Double Disc Pump

The Penn Valley pump is a diaphragm pump. Penn Valley has acknowledged this in their patent # US 7,559,753 B2, where they reference application # GB 2013287A Diaphragm pump as the basis of construction. Also Penn Valley’s application with the trademark office also reference diaphragm pumps.


Pump Comparison Chart Sludge Pro vs. Penn Valley


Features

Wastecorp Sludge Pro®Pump Technology

Penn Valley Pump Co. 

Technology

  • Positive displacement reciprocating diaphragm pump per ANSI/HI standards
  • Positive displacement reciprocating diaphragm pump per ANSI/HI standards

Principle of Operation

  • Positive displacement pump using reciprocating motion and check valves to displace liquid from suction to discharge side of pump
  • Positive displacement pump using reciprocating motion and check valves to displace liquid from suction to discharge side of pump

Solids Handling Capability

  • All 3”, 4" and 6" pumps pass up to 2½” solids
  • Suction and discharge flow path are of equal sizes
  • 3” pump passes only ¾” solids
  • 4” pump only passes 1” solids
  • 6" pump only passes 2" solids
  • Suction flow path diameter is larger on suction and smaller on discharge. This may result in higher likelihood of blockages

Disc

  • Manufactured of ductile iron that acts as the pumping element in conjunction with the check valves
  • Disc has Lifetime warranty
  • Discs never contact the pump body
  • Diaphragm manufactured of elastomeric components that act as the pumping element as well the check valves
  • Diaphragms are wear item and have limited warranty
  • Diaphragm directly compress on pump body and debris, which can prevent sealing and cause deformation

Check Valves

  • Polyurethane ball checks encased in rugged cast iron valve chamber.
  • Clack Valve available in Buna-N, Neoprene, or viton
  • Rubber check valve encased between two pump bodies. Very difficult and labor intensive to access
  • A third separate inlet check valve is also required to aid in priming

Trunnion

  • Sealing device that flexes with the mechanical reciprocating motion to seal liquid within pump body
  • Sealing device that flexes with the mechanical reciprocating motion to seal liquid within pump body

Pumping Action

  • Reciprocating pumping with extended stroke length operating at low speed. Stroke length and speeds are directly proportional in positive displacement pumps
  • Low operating speeds (below 110RPM) provide less load on drive components and extended life on trunnion and disc by millions of cycles.
  • All reciprocating pumps create pulsing flows and use pulsation dampeners to reduce pulsation
  • Short stroke length requires very high speeds to achieve same flow rate
  • Check valves and trunnion have to work up to 5 times faster at higher speeds to obtain same flow
  • Operating speeds up to 500RPM which can cause faster wear of components
  • All reciprocating pumps create pulsing flows and use pulsation dampeners to reduce pulsation

Power Drive Arrangement

  • Standard mechanical gear reducer direct drive coupled to pump main shaft
  • Superior torque ratings over belt and pulley systems
  • Pump shaft connected by flexible coupling assembly to drive arrangement
  • Coupling aids to handle any shock loads and prevent backlash and noise
  • Standard antiquated belt and pulley technology
  • Belts tend to slip at higher torque ratings
  • Pump shaft connected by taper bushing to drive arrangement
  • Pump/drive arrangement take brunt of any shock loads and backlash
  • Offers gear reducer direct drive as an option

Maintenance

  • Coupling provides easy access to drive pedestal assembly for replacement of trunnions and disc (one process)
  • No need to crawl under pump to maintain trunnions or discs
  • Easy access to check valves through quick-opening valve covers.
  • Check valves and suction trunnion only accessed from below pump
  • Drive pedestal must be removed from belt drive system to replace discharge trunnion
  • To replace the internal clack valve, the suction elbow must be disconnected from pump housing

Base Frame

  • Heavy-duty fabricated steel channel with supporting pedestal feet for direct mounting to floor (optional 304SS foot base)
  • 304SS lightweight tube frame with pedestal feet

Installations

  • Wastecorp has been manufacturing reciprocating positive displacement pumps for over 24 years
  • References available for Sludge Pro pumps upon request.

Manufacturing Capability

  • ISO 9001 and ISO 14001 certified facility.
  • Made in North America
  • No ISO quality control certification

Warranty

  • Two (2) Years (Lifetime on Discs)
  • Two (2) Years (limited warranty on check valves)

Spare Parts

  • Large inventory of parts kept in stock for next day delivery
  • Spare Parts kept in inventory in select local Counties, Cities, States and Provinces
  • ?

About Wastecorp Pumps

Wastecorp is an ISO 9001 and ISO 14001 certified pump manufacturer with decades of positive displacement pump experience in the municipal and industrial sectors. Wastecorp’s North American based manufacturing facilities make a diverse range of high quality pumps primarily used for wastewater fluid transfer applications. The company specializes in sewage pump and wastewater pump manufacturing. This includes multiple products for municipal/industrial applications. Information about Sludge Pro Double Disc Pumps can be found here.


What is a Double Disc Pump?

Wastecorp, Penn Valley and others are categorized as a reciprocating positive displacement mechanical diaphragm pump as defined by the American National Standards Institute/Hydraulic Institute Standards, who is the recognized global authority of pump guidelines and standards.

Wastecorp uses this terminology to distinguish the large disc used in the Sludge Pro’s patented pump design. The disc is the main element that transfers the liquid in conjunction with the check valves. The trunnion is the flexible seal that ensures a leak free design. The robust design has an excellent track record of long term durability and trunnions are engineered to last millions of cycles.


Are Parts for Sludge Pro Double Disc Pumps Available Within 24 hours?

Yes. Wastecorp can send parts for your double disc pump for delivery within 24 hours in most areas of the United States and Canada. In select areas, Sludge Pro parts are stocked in the State/Province or county that the pumps are located in.